code: def __buildRSI(self, values, period, rsiMaxLen=None):
      seqDS = dataseries.SequenceDataSeries()
      ret = rsi.RSI(seqDS, period, rsiMaxLen)
      for value in values:
          seqDS.append(value)
      return ret
  
file_path: pyalgotrade/testcases/technical_rsi_test.py
imports: from .None import common
  from pyalgotrade.technical import rsi
  from pyalgotrade import dataseries
label_desc: Use image node_id 2 for calling the TestCase obj's underlying member method code with example usage: obj.__buildRSI(values, period, rsiMaxLen) and returns: ret